Write a rational function f(x) such that f has vertical asymptotes at x = 3 and x = -1, no horizontal asymptote, and end behavior that can be modeled by y = 2x.

Step-by-step explanation:

Roots of a denominator in a rational function gives to us the vertical asymptotes. Hence we can take the denominator as

if we want that the end behavior as y=2x we can choose a polynomial whose factors cancel out with the denominator. Thus

Hence, the function is

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